Additional AI test cases

Homework.Tests/AuthControllerTests.cs

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+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Options;
+using Xunit;
+
+namespace Homework.Tests
+{
+    public class FakeLogger : Logger.ILogger
+    {
+        public readonly List<(Logger.LogLevel level, string message)> Messages = new();
+
+        public void Trace(string message) => Log(Logger.LogLevel.Trace, message);
+        public void Debug(string message) => Log(Logger.LogLevel.Debug, message);
+        public void Info(string message) => Log(Logger.LogLevel.Info, message);
+        public void Warning(string message) => Log(Logger.LogLevel.Warning, message);
+        public void Error(string message) => Log(Logger.LogLevel.Error, message);
+        public void Fatal(string message) => Log(Logger.LogLevel.Fatal, message);
+
+        public void Log(Logger.LogLevel level, string message)
+        {
+            Messages.Add((level, message));
+        }
+    }
+
+    public class AuthControllerTests
+    {
+        [Fact]
+        public void Login_ReturnsOkWithToken()
+        {
+            var logger = new FakeLogger();
+            var jwtOptions = Options.Create(new JwtSettings
+            {
+                Key = "test-secret-key-very-long-and-secure",
+                Issuer = "homework",
+                Audience = "homework",
+                ExpireMinutes = 60
+            });
+
+            var jwtService = new JwtService(jwtOptions);
+            var controller = new AuthController(jwtService, logger);
+
+            var request = new LoginRequest
+            {
+                Email = "user@example.com",
+                Password = "password123"
+            };
+
+            var result = controller.Login(request);
+
+            Assert.IsType<OkObjectResult>(result);
+
+            var okResult = (OkObjectResult)result;
+            Assert.NotNull(okResult.Value);
+
+            var tokenProperty = okResult.Value.GetType().GetProperty("token");
+            Assert.NotNull(tokenProperty);
+
+            var tokenValue = tokenProperty.GetValue(okResult.Value) as string;
+            Assert.False(string.IsNullOrWhiteSpace(tokenValue));
+            Assert.Contains("ey", tokenValue); // JWT tokens start with ey
+
+            Assert.Contains(logger.Messages, x => x.level == Logger.LogLevel.Info && x.message.Contains("Login attempt"));
+            Assert.Contains(logger.Messages, x => x.level == Logger.LogLevel.Info && x.message.Contains("successfully logged in"));
+        }
+    }
+}